第C#多線程TPL模式下使用HttpClientstringuserName=Request.Headers["UserName"];

stringpassword=Request.Headers["Password"];

if(userName=="admin"password=="123")

//保存文件

file.SaveAs(Server.MapPath("~/"+file.FileName));

return"ok";

else

return"error";

}

然后創(chuàng)建一個(gè)Winform程序，用來(lái)發(fā)送Http請(qǐng)求。界面上有三個(gè)按鈕，分別發(fā)送三種不同內(nèi)容的Http請(qǐng)求。

1、發(fā)送表單內(nèi)容的請(qǐng)求

我們看下面發(fā)送表單請(qǐng)求的代碼：

///summary

///模擬發(fā)送表單內(nèi)容的Http請(qǐng)求

////summary

///paramname="sender"/param

///paramname="e"/param

privateasyncvoidbtnForm_Click(objectsender,EventArgse)

//實(shí)例化對(duì)象

HttpClientclient=newHttpClient();

Dictionarystring,stringdic=newDictionarystring,string

dic["userName"]="admin";

dic["password"]="123";

//參數(shù)

FormUrlEncodedContentcontent=newFormUrlEncodedContent(dic);

//發(fā)送post請(qǐng)求

HttpResponseMessageresponseMsg=awaitclient.PostAsync("http://localhost:55179/HttpClientTest/login",content);

//返回報(bào)文體

//responseMsg.Content

//返回響應(yīng)頭

//responseMsg.Headers

//返回響應(yīng)碼

//responseMsg.StatusCode

//獲取返回值這里確定返回的是字符串，調(diào)用string

stringmsg=awaitresponseMsg.Content.ReadAsStringAsync();

MessageBox.Show($"響應(yīng)碼:{responseMsg.StatusCode.ToString()}");

MessageBox.Show($"返回內(nèi)容：{msg}");

}

程序運(yùn)行結(jié)果：

點(diǎn)擊確定，查看返回內(nèi)容：

2、發(fā)送json格式內(nèi)容的請(qǐng)求

下面是發(fā)送json內(nèi)容請(qǐng)求的代碼：

///summary

///發(fā)送json

////summary

///paramname="sender"/param

///paramname="e"/param

privateasyncvoidbtnJson_Click(objectsender,EventArgse)

//json格式的字符串

stringjsonData="{userName:'admin',password:'123'}";

//實(shí)例化對(duì)象

HttpClientclient=newHttpClient();

StringContentcontent=newStringContent(jsonData);

//設(shè)置contentType，必須要設(shè)置設(shè)置為json格式，MVC會(huì)自動(dòng)轉(zhuǎn)換成Model類型

content.Headers.ContentType=MediaTypeHeaderValue.Parse("application/json");

//發(fā)送post請(qǐng)求

HttpResponseMessageresponseMsg=awaitclient.PostAsync("http://localhost:55179/HttpClientTest/login2",content);

//獲取返回值

stringmsg=awaitresponseMsg.Content.ReadAsStringAsync();

MessageBox.Show($"響應(yīng)碼:{responseMsg.StatusCode.ToString()}");

MessageBox.Show($"返回內(nèi)容：{msg}");

}

3、上傳文件

看一下上傳文件的代碼：

///summary

///上傳文件

////summary

///paramname="sender"/param

///paramname="e"/param

privateasyncvoidbtnUpload_Click(objectsender,EventArgse)

//實(shí)例化對(duì)象

HttpClientclient=newHttpClient();

MultipartFormDataContentcontent=newMultipartFormDataContent();

content.Headers.Add("UserName","admin");

content.Headers.Add("Password","123");

using(Streamstream=File.OpenRead(@"F:\數(shù)據(jù)庫(kù).txt"))

content.Add(newStreamContent(stream),"file","test.txt");

HttpResponseMessageresponseMsg=awaitclient.PostAsync("http://localhost:55179/HttpClientTest/Upload",content);

//返回值

stringmsg=awaitresponseMsg.Content.ReadAsStringAsync();

MessageBox.Show($"響應(yīng)碼:{responseMsg.StatusCode.ToS